 /* 
    去除带有默认样式的标签的样式
    样式重置
*/
body{
    color: #333;
    font-size: 16px;
}
body,ul,h1,h2,h3,h4,h5,h6,p,ol,dl,dt,dd{
    margin: 0;
}
ul,input,button{
    padding: 0;
}
/* 找到标签<input type="button" /> */
input[type=button],button{
    box-sizing: content-box;
}
a{
    text-decoration: none;
    color: #000;
}
li{
    list-style: none;
}
i,em{
    font-style: normal;
}
b,strong{
    font-weight: normal;
}
